Automatic waffle machine



March 4, 1 930.

C. O. CHRISTIANSON AUTOMATIC WAFFLE MACHINE Filed Dec. 5, 1928 11 Sheets-Sheet l 3nventor Q.O.Christianson fg w/ Fig. 1.

Fig. 2.

March 4, 1930. c. o. CHRISTIANSON I 1,749,414

AUTOMATI C WAFFLE MACHINE Filed Dec. 5. 1928 11 Sheets-Sheet 2 illllll lllli Zmventor C.O.Chr1s,t1anson v ttorneg March 1930. c. o. CHRISTIANSON ,7 1

AUT OMAT I C WAFFLE MACHINE Filed Dec. 5, 1928 ll Sheets-Shee 3 Imventor C.O.Chmstumson ttorneg March 4, 1930. c. o. CHRISTIANSON 1,749,414

AUTOMATIC WAFFLE MACHINE Filed Dec. 5, 1928 11 Sheets-Sheet 4 G. 0.Christians0n BB 6-. M

attorney March 4, 1 930 C. O. CHRISTIANSON AUTOMATIC WAFFLE MACHINE Filed Dec. 5, 1928 ll Sheets-Sheet 5 0 o o o 0 9 1 Bummer \6l m (7.0. hm'stianson 3 Y 9 f'r flattomcg March 4, 1930. c. o. CHRISTIANSON 1,749,414

AUTOMAT IC WAFFLE MACHINE Filed Dec. 5. 1928 11 Sheets-Sheet 6 Fig.9.

# M Y I attorney March 4, 1930. c. o. CHRISTIANSON f AUTOMATI C WAFFLE MACHINE Filed Dec. 5. 1928 11 Sheets-$heef '7 zlttorneu March 4, 1930. c. o. CHRISTIANSON AUTOMATIC WAE FLE MACHINE Filed Dec. 5, 1928 ll Sheets-Sheet 8 3nventor tianson March 4, 1930.

c. o. CHRISTIANSON 1,749,414 AUTOMATIC WAFFLE MACHINE Filed Dec. 5, 1928 ll Sheets-Sheet 9 i lll' lmf Wall, 1 ISmaentor C.O.Gh1'istians0n Gttorneg March 4, 1930. c. o. CHRISTIANSON 1,749,414

AUTOMATI C WAFFLE MACHINE Filed Dec. 5, 1928 ll Sheets-Sheet 10 Ihwentor C.O.Christianson (Ittorneg March 4, 1930.

c. o. CHRISTIANSON 1,749,414

AUTOMATI C WAFFLE MACHINE Filed Deo. 5. 1928 ll Sheets-Sheet 11 s lam k Gttomeg Patented Mar. 4, 1939 nnirsnsTATEs PATENT OFFICE I, CARL O. CHRISTIANSON, OF MERRIMAN, NEBRASKA, ASSIGNOR TO SUPER-AUTOMATIC i FOOD-MACHINE CORPORATION, OF VALENTINE, NEBRASKA AUTOMATIC 'WAFFLE MACHINE 7 Application filed Decemberfi, 1928. Serial No. 323,815.

This invention relates to a machine for bak-' ing and dispensing waffles, hot cakes and any other bakers products requiring the use of a seasoned batter having a consistency permitting it to flow from a mixing chamber to a grid or heating-plate.

The invention is shown and described in connection with a machine for baking waflies, and has for its object to provide such an arrangementof parts that, without any attention of an operator, a measured supply of ingredients willbe conducted to a mixing chamber where it will become mixed to form a batter, will cause a grid to become heated, will conduct the batter to the grid for baking, will remove thewaffle from the grid when baked, and will deliver it to a customer who, to produce these operations, has first deposited a coin in the machine, the waflle when thus delivered being cut in slices, placed on a paper plateand syrup poured thereon.

Another object is to provide a machine for the purposes mentioned which will, occupya limited space so that it will be portable and convenient in use.

The invention includes numerous electromagnets and several valves and controls for compressed air.

lVith the foregoing objects in view and others to be mentioned, the invention presents a new and useful construction, combination and arrangement of parts as described herein and claimed, and as illustrated in the accom- 'p'anying drawings, it being understood that changes may be made in form, size, proportion and minor details, said changes being determined by the scope of the invention as claimed.

' In the drawings which illustrate one embodiment of the invention, 1, is a front view of the machine. Fig. 2 is an enlarged sectional detail showing a magnetic air valve. 1 Fig. 3 is a side View of the machine. Fig. 41s a rear view of the machine. Fig. 5 is a longitudinal section through the measuring and mixing receptacles and showing operating mechanism. Fig. 6 is a sectional view "of parts taken at right angles to the view shown I in Fig. 5. Fig. 7 is a detail, being a side view showing baking mechanism and operating parts. Fig. 8 is a plan view of the parts shown in Fig. 7. ,Figs. 9, 10 and 11 are detail views relating to the baking mechanism. Fig. 9 is a cross-section through a pair of grids or heating-plates. Fig. 10 is a plan view of the lowergrid or heating-plate shown in Fig. 9. Fig. 11 is an end view of the grid shown in'Fig. 10, illustrating its pivotal mounting on the machine frame, and, by dotted lines showing grid when waffle is discharged therefrom. Fig. 12 shows an end view of an electric motor and speed reducing mechanism.

Fig. 13 is a detail relating to the lower part of Fig. 4, to show waffle-cutting and waffledispensing means. Fig. 14 shows a part of a syrup-dispensing device, being an enlarged detail relating to Fig. 13. Fig. 15 is a perspective view of a tray or paper plate for holding waffles. Fig. 16 is a plan view of the parts shown in Fig. 13.

Figs. 17, 18 and 19 are details relating to Figs. 13 and 16. Fig. 17 is a side view of a plate-releasing device. Figs. 18 and 19 are plan views of the device shown in Fig. 17. Fig. 20 is a perspective view showing a commutator, electrical switches and a coin-releasing device mounted on an instrument board. Fig. 21 is a sectional view of a commutator showing cable for inleading current, a rotatable shaft and disc and brush, carried by the disc. Fig. 22 is an end view of the parts shown in Fig. 21. Fig. 23 is a diagrammatic view showing, in perspective, pipe lines for conducting air, water and liquid seasoning, also showing plungers and an air compressor. Figs. 2land 25 are sectional details relating to Fig. 23. Fig. 2 1 shows a magnetic valve for controlling the flow of liquid seasoning, and Fig. 25' illustrates a check valve. Fig. 26 is a diagrammatic view illustrating all of the electrical connections. Fig. 27 is a detail relating to Fig. 20.

, Referring now to the drawing for a more particular description, numeral 1 indicates a frame for the support of mechanism to be described, said frame being provided with a base 2 and, preferably, the base is provided with legs (not shown) so that the machine may be conveniently moved and that its opcrating parts will be disposed at a suitable height.

In the operation of the machine the wafiies are baked in pairs so that, when delivered, one will be disposed upon the other. It will be appreciated that means must be provided for measuring and mixing the ingredients before the wailies are baked. A batter must be provided consisting of the proper proportions of dry ingredients, water and seasoning. Means must be provided for heating the grids for baking and for controlling the heat so that baking of the wafiies will be uniform, and means must be provided for cleaning and cleansing the mixing receptacle after each operation, so that the parts will be maintained in a sanitary condition.

As best shown in Figs. 5 and 6 of the drawing, the hopper 3 for containing the dry ingredients, the measuring cups 4 for measuring these ingredients and receptacles 5 for receiving same, water, and liquid seasoning, and mixing the same, are disposed directly below the hopper.

Means for these operations will be fully described.

As best shown in Figs. 7, 8, 9 and 10, the grids or heating-plates are arranged in pairs, the lower grid of each pair being indicated at 6 and the upper grid being indicated at 7. Numerals 8 indicate a pair of side-plates for guiding and receiving the waffles as soon as baked and at 9 (Fig. 13) is indicated a tray which receives the waflies on a paper plate (Fig. 15) after they have been sliced by stationary knife-blades 10.

All operations of the machine are fully automatic, and are started by depositing a coin in a slot in the casing 13 of the machine.

The operations will then be carried out in rapid succession and in order as follows:

The shaft of the electric motor 14 will commence to rotate.

The electric circuit leading current to the heating elements of the grids will beclosed.

When the machine is not operating the lower grids 6 maintain a position as shown by dotted lines in Fig. 4 and when the machine commences operation they will be swung upward to close against the upper grids 7 which at that moment are in a horizontal position. Coincident with this motion of thelower grids, dry ingredients from measuring-cups 4 are discharged into mixing-receptacles 5.

As soon as the grids have reached a fixed degree of heat suflicient for baking, liquid ingredients are added to the dry ingredients in the mixing-receptacles and all the ingredients are thoroughly stirred.

The upper grids will next be swung into their upperor open positions as shown by dotted lines in Fig. 4, to permit the batter to be deposited upon the lower grids.

The batter is'discharged from the mixing- When the waflles are baked the lower grids,

are swung down to their previous position, one of the waiiies being deposited on the knives 10 the other being deposited upon rack 11, best shown in Figs. 13 and 16 of the draw- IIIUS. I 7

The waflles are next cut and placed on a paper plate (Fig. 15) and syrup is poured thereon.

At last the waffles in the paper platewill be pushed out of the machine to the customer. 7

The means for carrying out these opera tions will now be described 1n the order above mentioned.

The lowermost end of the coin slide 12,

which extends from the casing 13 inwardly of the machine is provided with a pair of metallic bars 17 (Figs.20 and 26). lVhen a coin 18 is deposited it will move down the slide 12 and will come into contact with the bars 17 where it will be held in place by a spring 15, shown in Fig. 20 of the drawings. One of these bars is in electrical communication withthe positive terminal 16 of an electric storage battery 16, (Fig. 26) or other suitable source of electric current, by the electrical conductor 19. Through the coin, tli

electrical current continues by'electrical conductor 20 to the field-winding 21 of the horseshoe-magnet 22, said field-winding being grounded to the frame of the machine.

The negative terminal 16 of battery 16 is also grounded to the frame. The armature 23 attracted by magnet 22 carries a metallic contact-piece 24, insulated from the armature, which then will move into contact with a stationary contact-piece 25. Contact-piece 24 is in electric communication with an outlet 26 of a llO-volt service line by electric conductor 27. From contact piece 25 this currentpasses through electrical conductor 28 to the electric motor 14 and'thence by electric conductor 29 f back to service-line. I

Numeral 30, best shown in Figs. 3 and 12 of the drawings, indicates mechanism for high and low speed. Only the high speed engagement will now be described. On the shaft 31 of the motor 14 is secured a bevel gear 82 which is in engagement with thebevel gear 38 which is mounted on a shaft 34but not secured to this shaft. A clutch 35 is keyed to the shaft in such a way that it rotates with the shaft and can be moved along the same. This clutch is now held in engagement with a female clutch 36 by a spring 37 .7 The clutch 36 is securely screwed on to the hub of the bevel gear 33. The shaft'34 is thus rotated at the same speed as the bevel. gear On the other end of this shaft is secured a bevel inengagement with the bevel gear 39 which is mounted on shaft 40, best shown in Figs. 1

' and 4 of the drawings.

' 23of the drawings, is operated by the rotation of said spur-gear 46.

A piston rod 48, having a piston 49 at each end, is moved by the connecting-rod 50 which is connected to the spur-gear 46.

The electric conductor 51 (Fig. 26) connects with the electrical conductor 28 and leads to the field-winding 52 which, by electrical conductor 53, is in electrical communication with the electrical thermostat 54. The other terminal of the electrical theri'nostat by electrical conductor 55'and part of the electrical conductor 29 in communication with the service line 26. The current flowing through this circuit will by means of fieldwinding 52 magnetize the iron core 56 which then will attract armature 57. The armature will then come in electric contact with contact-pieces 58 and 59. An electrical current from the service-line will then, through electrical conductor 60, contact piece 58, armature 57, contact piece 59 and electrical conductor 61, pass to the heating elements 62 of the grids and thence through electrical con ductor 63 back to service line 26. The grids then commence to become heated.

The lower grids are swung upward from their lower position (Fig. 4) to close against theupper grids in order that the loss of heat of the'grids by radiation, will be as'small as possible.

A plunger, operated by force of compressed air, together with other parts, best shown in Figs. 7 and 8 of the drawings, is employed to carry out this motion.

.The plunger-consists of a tube having an I opening in its wall midway between its ends.

Each end of this tube is provided with a cylinder-head; 64 with a port 65, best shown in Fig. 20f the drawings. i

,Axpiston 66 is provided for each end of a piston rod 67, one piston moves between one end of the tube and the above mentioned I opening, and the other piston moves between the opening and the other end of the same tube.

' On the piston rod 67 of plunger X (Figs. 7 and 8), midway between the two pistons, is secured a bar 68 which has a slot at each end.

A pin 69 in the rock-levers 70 fits into these slots. The rock-levers are secured to the end of shafts 71, and each lower grid is, by brackets 72, secured to the same shafts. The outer ends of the rock-levers carry a weight 73 to counter balance the weight of each grid. The shafts 71 have bearings in the frame 1.

Compressed air from the air-compressor is, by means of an air-conduit 74 (Fig. 23) conducted to a magnetic air valve 75, mounted on the cylinder-head at the lower end of plunger X.

A field-winding 76 (Fig. 26), of this valve, when energized, will attract the soft iron core 77 (Fig. 2) moving within the housing 78, so that it will strike the stem of valve 79, moving it against the spring 80.

A valve-cone 81, screwed on the stem of valve 79 will then close the port 82. Compressed air can thus enter the housing and between the wall of same and core 77 through port enter the plunger.

It is thus obvious that the lower piston of the plunger will move upward and by the ust described.

This valve remains closed while the other is open. The port 82 is then open and provides an outlet for the air that is compressed by the upper piston.

To energize the field-winding 76 an electrical circuit is provided consisting of an electrical. conductor 83 (Fig. 26) connecting with electrical conductor 20 and leading to a movable arm 84, at this stage of the operation of the machine, in contact with a screw 85 which is screwed into a bracket 86. This bracket, by electric conductor 87, is in communication with electrical conductor 88, which leads to above mentioned field-winding 76, and as can be seen the same electrical conductor also leads to the field-winding 89 of the horseshoe magnet 90.

The magnet 90 has for its object to cause a measured amount of dry ingredients to be discharged to the mixing receptacles. Numeral 91 indicates a stirring-member or agitator shown in Figs. 5 and 6. It is mounted on the revoluble shaft 44 and operates to sift the dry ingredients in the lower part of the iopper 3, through the sieve 92 into the pair of measuring cups 4.

The hopper is mounted on the upper part of a housing 93. This housing provides bearings for the rotatable measuring cups and the rotatable mixing receptacles. It provides an upper cylindrical tapered part for a mount in g therein of the measuring cups and a lower cylindrical tapered part communicating with the upper cylindrical part for a mounting perature for baking is reached. current leading to the field-w nding 52 1s therein of the mixing receptacles as best shown in Figs. 5 and 6 of the drawings.

The measuring cups 4 consist of a cylinder closed at both ends and'divided by partitions into two compartments or cups. This cylin- When the horseshoe-magnet is agitated by its field winding 89, as heretofore described, the armature 96 (Fig. 5) of this magnet will be attracted. An arm 97, provided with a toothed segment, and fastened to said armature will by the action of the armature be swung downward. The toothed segment engages a spur-gear 98 which thus will turn. The movement of the arm is limited so that said gear 98, which is mounted on trunnion 99 (Fig. 6), will turn only 180 degrees, the trunnion being tightly screwed into a hub 1n one end of the cylinder forming the measuring cups. The cups will thus be turned in above mentioned arc of 180 degrees and their openings will then be in communication with similar openings 100 in the mixing receptacles so that the contents of the cups will be discharged into the mixing receptacles 5.

These receptacles 5 are formed of a tapered cylinder, by useof partitions which provide two equal compartments with the ends closed. These two compartments are referred to as miXing receptacles. Each receptacle has an opening 100, as above mentioned, and at 90 degrees from said opening 1s provided another similar opening 101. g V

This cylinder is received in the lower chamber of housing 93, and is pressed into the smaller end of same by a spring 102 bearing against the packing box 108, which'is secured to the housing.-

The thermostat 54 is mounted on one of the lower grids so that it and the grids always will be of thesame temperature. The thermostat is adjusted to break the current passing through it as soon as the proper tem- The electric thus broken, which results in the core 56 losing its magnetism so that the armature 57 by a spring (not shown) will be pulled from contact with contact-pieces 58 and 59 so that the current leading to the heating elements 62 of the grids will be broken. The grids are thus prevented from becoming overheated. It is at this moment that the liquid ingre' clients are to be added.

In the new position of the armature 57 it will make a contact with a metallic contactpiece 104 (Fig. 26). An electrical current through the electrical conductor 105, connected with electrical conductor 20 will then pass through the armature and contact-piece just mentioned, and conductor 'l06tto the fieldwinding 10? of a-horseshoe-magnet 108.

Said field-winding is groundedto the frame of the 'machlne'.

The armature 109 of same horseshoe-magwheel 114, to be swung toward the disc 115,

above men- 7 this motion'being carried out by tioned action of the'armature.-.

' When this armature is not attracted a coiled spring116 holds it a short distance from the poles of the horseshoe-magnet and consequently the friction wheel 114 is disengaged from the disc 115.

The shaft 111 and with it the friction wheel is turned by the motor 14 at a very low degree of rotation. I a 7 On the end of the motor shaft, opposite to the end that is connected to the speed-reducing mechanism 30 is a worm 117 (Fig. 1) engaging a worm-wheel 118 to which a. second worm 119 (Fig. 20) is secured. The last named worm engages with worm-wheel 113.

hen the friction wheel 114 is in engagement with the disc this will thus be slowly turned around. By referring to Fig. 21 it will be seen that the disc is secured to the end of a shaft 120 which rotates in a bushing 121, said bushing being stationary with an insulating-sleeve 122, and by means of said sleeve the shaft is insulated from the commutator. By an elongated collar on bushing 121 the commutator is bolted to an instrument-board 124. A contact-brush 125 is secured to and in electrical contact with the disc which, when moving, causes the brush to slide over the different bars of the commutator. municationwith electrical conductor 20 by electrical conductor 126, bushing 121, shaft 120 and disc 115. 1

Before it has been described that when the The brush is in electrical com armature 57 is in contact with contact pieces 58 and 59, electric current flows through the heating elements of the grids, heating same.

In thisposition of said armature it can be seen 1n Flg. 26 that no current is flowing through the contact-piece 104 'andelectrical conductor 106 and consequently the horseshoe-magnet 108 is'not operating. Not be fore the grids have reached their baking temperature does the armature 57 get in contact with said contact-piece 104, and it is therefore obvious that the horseshoe-magnet 108, controlling the motion of the commutavalve in plunger Y opens for inlet of compressed air, supplied by conduit 74 shown in Fig. 23 of the drawings, the upper grids will be swung upward to a position shown by dotted lines in Fig. 4 of the drawings.

The electrical'current for opening the lower valve of said plunger Y issupplied, when the commutator-brush covers bar D of the commutator,-by an electrical conductor 165 leading to the field-winding 166 of the magneticair-valve (Fig. 26)

I The discharge of the batter from the mixing receptacle to the lower grids will now be described.

The shaft with its wings 157, has until this stage in theoperation of the machine been revolving, as described, at high speed. To permit the batter to be discharged from the mixing receptacles through the openings 167 in the lower part of the housing 93, it is necessary that these wings rotate at 'a low speed, when they, by gently scraping against the walls of the receptacles, will loosen the batter and it will move readily through said openings. Means for revolving the shaft 40 at low speed will now be described. I

The high and low speed mechanism shown in Figs. 1, 3 and 12 has already been partly described. Onshaft 31 of the motor 14 is secured-a worm 168 in engagement with a worm-wheel 169, secured on the end of the shaft 170 on which at the other end is fastened a spur-gear 171 in engagement with another spur-gear 172. This last spur-gear is mounted on shaft 34 but is not fastened to same. i

In high speed engagement, gear 172 is therefore only idling around its shaft. Numeral 173 indicates'a field-winding stationary mounted around the female clutch 174, which is secured'to gear 172.

When this field-winding is energized, the

I male clutch 35 will be attracted and come in engagement with clutch 174.

The bevel gear'33 will then operate as an idler on its shaft, and the gear 172 turning at low speed now being locked to the shaft 34, will transmit its rotation to saidshaft, and, by means of bevel gears 38 and 39, to shaft 40.

)Vhen the commutator-brush covers bar E (Fig. 26) of the commutator, electrical current will flow through electrical conductor 175 to ,above mentioned field-winding 173 and, also to the field-winding 176 of the horseshoe-magnet 177, best shown in Fig. 5 of the drawings.

. he armature 178 of the same horseshoemagnet will then be attracted.

ment engaging with spur-gear 180, is fastened to said armature. Spur-gear 180 is a part of the packing-box 158 which is fastened to one end of the cylinder forming the mixing receptacles. Acertain limited motion of said ar mature will thus swing these receptacles 90 degrees so that the openings 101 will register with openings 167 in the lower part of the housing 93, and the batter will enter the lower grids.

When the commutator-brush has left con tact with bar E the current on field-winding 173 and field-winding 176 ceases to flow. The spring 37 (Fig. 12) then pushes the clutch 35 back into its high speed engagement and the spring 181 fastened to above mentioned arm 179 will swing this arm back to its previous position, thereby swinging the mixing receptacles back so that openings 167 will be closed (Fig. 5).

When the cold batter enters the'lower grids, these will be somewhat reduced in temperature. The thermostat 54 (Fig. 26) will then again close the circuit of which field-winding 52 is a part, so that the armature 57 will get in contact with contact-pieces 58 and 59, and thus again permit electrical current to flow through the heating elements of the grids until the proper temperature is again reached.

By this motion of said armature it can be seen that the contact with contact-piece 104 is broken. The current through electrical conductor 106 to field-winding 107 will then cease to flow, which (Fig. 20) would result in friction-wheel 114 disengaging the disc 115 so that the motion of the commutator-brush would cease. To prevent this last named operation, the arm 84 when it is moved from contact with the screw 85 as before described, slides from a segment 182 (Figs. 20 and 26) into contact with the segment 183. The first segment has no electrical connections and its purpose is only to provide the arm 84 with. a smooth sliding surface. )Vhen the arm gets in contact with segment 183 an electrical current will flow through said segment, electrical conductor 184 and part of 106 to fieldwinding 107, which thus, regardless of the motion of armature 57, is energized so that the commutator-brush will continue its motion.

The next operation of the machine is to bring the upper grids down to close over the batter.

Compressed air from conduits 74 (Fig. 23) is let into the upper end of plunger Y by corresponding magnetic valve, and by the mechanical connection between the piston-rod and the upper grids, as before described, these grids will go down; The electrical circuit for operating said magnetic valve is provided when the commutator-brush covers bar F of the commutator (Fig. 26). Through conductor 185 electrical current will then tor-brush, will not get in operation before the grids have been sufiiciently heated.

When the machine is not operating the brush covers a bar'A of the commutator, which bar has no out-leading electrical-connection. r I

The motor 14, its speed being nearly the same at; all times, will by proper reducement of speed ofshaftlll, before described, cause the brush to make a complete circle around the commutator in about two minutes. This time can be decreased or increased by" moving the friction-wheel 114 on its shaft 111, respectively nearer or farther from the center of the disc. V

Numeral 127 indicates a segmental flange secured to the disc 115, best shown in Figs. 20 and 21 of the drawings. One end of said flange bears against the movable arm .84 so that a slight motion of thedisc will move the arm off contact with the'screw 85, thus breaking the circuit leading to field-windings 76 and 89.

he armature 96 of horseshoe-magnet 90 (Fig. 5) will then be pulledback to its first position by the spring 128. The measuring cups 4 are thus again in posit-ion to receive dry ingredients from the hopper and the magnetic air-valve, controlled by the grounded field-windin 76 will close so that no more valve 131 (Figs. 1 and23) and also to fieldwinding 132 of the horseshoe-magnet 133 (Fig. 26). The contact brush, in this posi tion will also get in electrical contact with a flexible metallic arm 134 (Figs. 20 and so that electrical current will pass-through this arm and electrical conductor 135 to the field-winding 136 (Fig-26) of a magnetic measuringvalve 137(Figs. 4. and 23) for liquid seasoning. All three field-windings just mentioned are grounded to the frame of the machine.

A pair of water-containers 138 are secured 'to the bottom of a water supply tank139,

and each container communicating with same, best shown in Figs. 1 and 23 of the drawings. Between operations of the machine, the valves 140 remain open permitting the containers to fill with water.

By the electrical circuit just described, horseshoe-magnet 133 will attract the armature 141 which by means of a rod 142 will lift a cross-bar 143 to which valves 140 are attached, this closing said valves against the bottom of the supply-tank.

Magnetic air-valve 131, of same construction as magnetic air-valve 7 5 (Fig. 2) with exception of the valve-cone81 and the port 82, receives compressed air through air-con- V duit 144 (Fig. 23), which connects with con duit 7 4 from compressor 47. i

This valve, when in operation, permits compressed air. to enter into the containers by a conduit 145.

The water in the containers 138, will then, through conduits 146' and port-s 147 in the. housing 93 (Fig. 23), be forced into the mix ing receptacles 5, which already contain'dry ingredients, as described. i

in order to obtain a smooth not stick to the aluminum grids a certain amount of liquid seasoning is added to the water by means of a magnetic measuringvalve 137, which operates inconjunction with valve 131 and horseshoe-magnet 133. i

A tank 148, best shown in Figs. 1 and 4 of the drawings, is by a partition divided into two compartments of which one contains liquid seasoning and by conduit 149 communicates with said valve 137'. By action of itsifield-winding 136 the soft iron core 150 (Fig. 24) will be attracted against thespring 151 closing the inlet so no more seasoning from tank 148 can enter.

By compressed air through conduit 152v (Fig. 23), leading from conduit 145, and entering said valve through port 153, the amount of liquid seasoning contained in the housing 154 will then, through conduit 155, uncovered by the core 150, be forced into conduits 146 and enter the mixing receptacles together with the water; Water and liquid seasoning is thusv added to the dry ingredients; The conduit 152 is provided with a check-valve'156 shown in Fig. 25 of the drawings, which permits compressed air from conduit 145 to enter the valve 137, but prevents liquid seasoning bygravitation from moving down into said conduit 145.

The shaft 40, as before described, has a high degree of rotation and, as best shown in Fig. 6'of the drawings, it .goes through the two mixing-receptacles 5. On this shaft, in each receptacle, is secured'a wing 157 which will beat the above mentioned ingredients to a smooth-batter. To prevent leaking around the shaft each outer end of said receptacles 1s provided with a packing-box 103 and 158.

A. suitable packing is tightened against said shaft by means of screws 159.

WVhil'e the commutator-brush passes over bar which is blank, that is, has no outleadlng electrical connection, the mixingof the batter is continued. The next operation of the machine-is to lift the upper grids so that the batter can enter the lower grids.

A bar 160 (Fig. 8) is secured to the pistonrod of a plunger Y, which is of the same construction as plunger X before described.

' This bar is provided ateach end with slots to receive the pins 161. The pins are secured in the brackets 162, fastened to their respective upper grids 7. By hinges 163 fastened to said grids the latter can swing around batter that will a Y W/V flow to field-winding 186 of said magnetic valve.

The upper grids thus being closed the actual baking of the waliles begins.

Cleaning of the mixing receptacles will now be described. The contact-bar G of the commutator is by electrical conductor 187 in electrical communication with conductor 129. .As before stated said conductor leads to field-windings 130 and 132 for the operation of valve 131 and valves 140 (Figs. 1 and 23).

When the brush covers this bar G of the commutator, water from the containers 138 for the second time during one complete operation of the machine will be forced into the mixing receptacles- This water is thoroughly stirred by thewings 157 which at that time are moving at high speed. The receptacles are in this way elficiently cleaned.

' While the commutator-brush travels over the long bar H of the commutator, which has no outleading electrical connections, the cleaning of the mixing receptacles and baking of the waflles continues.

- The commutator-brush, in contact with the bar I of thecommutator (Fig. 26), will permit electrical current to flow through electrical conductor 188 to electrical conductor 1'55 and open the mixing-receptacles for discharging the rinsing-water.

It has already been stated that conductor 175 carries electrical current to field-windings' 17 3 and 17 6, which respectively causes shaft 40 to revolve at low speed and mixing receptacles to swing'open for discharging their contents. The upper grids at that time, maintain, as described, a horizontal position, and each is provided with a V- shaped trough 189secured to its upper side, shown in Figs. 1, 3, and 4. In said position of the grids the'rinsing water from the mixing receptacles runs down into the troughs and thence through a funnel 189 which comm'unicates withthe tronghs,'runs down into a compartment of the tank 139.

vThen the commutator-brush enters contact with bar J (Fig. 26) the waffles are baked and are to be discharged from the grids.

The bar J of the commutator is by electrical conductor 190 in electrical communication with the field-winding 191 of the mag netic air-valve mounted at the upper end of plunger X.

When the compressed air by operation of said'valveenters the plunger, corresponding piston will move downward and by mechanicalmeans before described, will bring the i lower grids down to-their previous position mounted on a pin 193 which is secured to the grid itself by a pair of lugs 19 1 (Figs. and 11). Each end, 192, is provided with a lever 195 (Fig. 9).

When the lower grids have nearly reached their lower position, these levers will strike against a corresponding bracket 196, secured to the frame of the machine (Fig. 11). The ends will then turn around the pins into a position indicated by dotted lines in Fig. 9 of the drawings. The inner side of said ends 192 is provided with a thin base 192 which, as shown in dotted lines, will push the waflle out of the grid.

The ends 192, while the grids are in operation, are held closed, to prevent leakage of batter, by a spring 197 shown in Fig. 10 of the drawings.

The waffles thus discharged from the grids will slide down between the guides 8, one walile engaging the cutting knives 10, the other engaging the rack 11, best shown in Figs. 1 and 13 of the drawings.

The cutting of the waffles, placing them on a paper plate and pouring syrup thereon will now be described.

A plunger Z (Fig. 13) of same construction as plungors X and Y and like these provider, with magnetic air-valves, has a toothed rack 198, secured to its piston rod.

- The toothed rack engages with a spur-gear 199, which is mounted on the end of a shaft 200, having bearings on the machine frame.

On this shaft are secured four tongues 201. The rack 11 consists of three strips of sheet iron (Figs. 13 and 16), set edgewise between each of the four tongues, the lower ends of said strips being carried by shaft 200 and tne upper ends carried by a rod 202, which is secured to the guides 8. The latter, by brackets 203 are secured to the frame of the machine.

The cutting-blades 10 consists of 3 strips of sheet steel mounted on shaft 200 and to the guides 8 in same manner as the strips constituting rack 11.

When the commutator-brush gets into contact with bar K of the commutator an electrical current will pass through electrical conductor 20% to field-winding 205 on the magnetic air-valve at the right end of the plunger Z shown in Fig. 13 of the drawings. The compressed air entering this end of the plunger through conduit 74, shown in 23 of the drawings, moves corresponding piston from right to left, thus, by means of the toothed rack, turning the spur-gear anti-clockwise.

The four tongues 201 swinging with the shaft 200, will lift the waffle off from the rack 11 and place it upon the top of the waflle resting on the knives 10. The tongues swinging downward into an almost horizontal position, as indicated by dotted lines in Fig. 14 of the drawings, will force both Wattles down between the knives 10, and thereby cutting the waflies into four slices.

A knife 205 mounted on the frame of the machine transverse to knives lOwill out said slices in two. The waiiies thus each cut into eight pieces, falls down in a paper plate having a construction shown in Fig. 15 of the drawin s. In this )osition of the ton 'ues Figs. 17, 18, and 19 of the drawings.

syrup is poured over the Wattles in their paper plates. F ig. 14 of the drawings shows a cone-shaped outlet 206 secured to one of the tongues, and by a suitable hose 207 is in communication with tank 148 (Fig. 4), a compartment of which contains syrup of light consistency. I 7

Before the downward swinging movement of said tongues, the outlet 206 maintains a position as shown by full drawn lines in Fig. 14. The lid 208 held down tight over the opening of said outlet by a spring 209, will be openedby the extension 210 of the lid striking against a stop 211, when the tongues are down as above described.

The syrup will then pour through a hole 212 in the tongue to which said outlet is fastened, while the commutator-brush is passing bars K and L which latter has no outleading electrical connections. l Vhen the brush gets in contact with bar M on the commutator, the tongues, as later will be described, return to their previous position, and the outlet for syrup will then be closed.

Numeral 213 (Figs. 13 and 16) shows a connecting-rod mounted with one end on spur-gear 199 and the other end on a lever 214, fastened to a shaft 215, best shown in Fig. 16 of the drawings. When spurrgear 199, as described, turns in an anti-clockwise motion said connecting rod will swing the lever 214 so, that the lower end of same will move to the left from theposition shown in Fig. 13 of the drawings.

A latch 216, pivotally mounted on this lever, will then engage with an extension 217 of tray 9 as shown by dotted lines.

In Figs. 13 and 16 of the drawings is shown a square container 218 for holding a great number of paper plates piled one upon another. One of these plates at a time is dropped down to the bottom of said container by means of a feeder-clamp 219, shown in As shown in Fig. 16 there is one of these feederclamps at each side of said container. The

I feeders are moved by rods 220 of which one is attached to the lever 214, the other to a lever 221 mounted on the shaft 215, which, as stated, is moved by lever 214.

Fig. 19 shows the position of said feeders before lever 214 has started the motion-above described. The whole column of paper plates is then resting on top of the feeders. Lever 214 moving, will, by operation of rods 220, bring the feeders into a position as shown in Fig. 1 permitting the plates, by their own weight, to drop down on lug 222 of said feeders. I

As soon as the commutator-brush passes from bar L of the commutator .into contact with bar M an electrical current will flow through electrical conductor 223 (Fig. 26) to the field-winding 224. of the magnetic airvalve mounted onthe'left end of plunger Y. Compressed air from conduit 74 (Fig. 23),

permitted to enter the plunger by said mag- Spur-gear received thecut waiiies, will cause said plate to drop down on the platform227.

Numeral 228 indicates a pair of fingers secured to the tray, best shown in Figs. 13and 16. These fingers, when the tray, as. described, moves toward the container of the paper plates,- will pass under the plate at the bottom of said container so that they will assume a position as indicated by dotted lines in Fig. 13 of the drawings. p

When the tray with said fingers has reached this position, the free end of the latch will have passed under the armature 230, as shown in Fig. 13 of the drawings. r

The feeders 219 will, by same movementof lever 214 and rods 220, be swung backctoi the position shown in Fig. 19. i

feeders, best shown in Fig. 17, will then be crowded in between the lowermost plate and the ones above.' All plates, but the lowermost one, will then again be'supported on top of the feeder. Thelug 222, moving from position as shown in F 18, to the one shown in Fig. 19, will. leave this lowermost plate without support so it, by its own weight falls to the bottom of said plate container. In order that the above mentioned wedge may enter between the plates it is necessary that they be piled on each other in such a wa that a narrow opening be left between the side-flanges of said plates.v

When the commutator-brush gets into contact with bar N of the commutator (Fig. 26) an electrical current through electrical conductor 232 will iiow to the grounded fieldwinding 233 of the horseshoe-magnet 234 (Fig. 13).

The armature 230 will then be attracted and by pressing on the latch 216 the. latter will be lifted out of engagement with the tray which then, by action of the springs 226, suddenly moves back to its former position iio and by the fingers 228 pushes the plate at the a pawl 255. A spring 236, with one end fastened-to a bracket 237 and the other end to: the pawl, causes the latter to bear down on a pin 238 secured to the coin-chute 239.

When finally the commutator-brush has completed a full circle around the commutator and again is in contact with the bar A (Fig: 26) the arm 84 will have been moved by the segmentalfi-ange 127 into a position asindicatedin Fig. 27 of the'drawings. The

pawlprovided at its free endwith a deep notch will then be in engagement with a pin 240 in the coin-release 241, which is formed of a; U-shaped pieceof flat steel, and mounted on pivot 1242, secured to the instrumentbo'ard. In saidpositi'on of arm 84 the spring 2 36 will be stretched so that, when by a slight motion of. the commutator-brush, said arm. is released from the segmental'flange,

it will be: pulled back swiftly to its previous or starting position. The pawl 235 being moved by arm 84' will then swing the coinrelease on its pivot so that one of its legs, entering a slot 243 in the lowermost end of the coin-slide 12, will strike against the coin and forc'eit past the spring 15'and through the chute 239 down into a receptacle 244:.

Thepawl is provided between its ends with a slantingrecess, which, after the coin is released, will bear against the pin 238 and cause the pawl to be lifted out of engagement with the pin 240 in the coin-release, which by a spring 1245 will be returned to its previous position.

It is ob viou's'tha'twhen the coin thus leaves Contact withthebars 17 all circuits carrying current to operating parts will be broken sotha t action of the motor and commutatorbru'shwill cease, and only by depositing a new coin will the machine commence operation.

While only a fragment of the casing 13 hasbeen shown in the drawings it will be understood, of course, that the machine should be enclosed in order to exclude dust or' steam and preferably the casing should be transparent so that the movements of parts which: operate automatically may be seen.

I claim as my invention 1'. waflle machine, a frame, bakinggridsarranged inp'airs and mounted on the frame, a housing havingdischarge apertures and disposed above the baking-grids, a pair of cylindrical mixing-receptacles in the housing each having a discharge-aperture and an intakenperture, a hopper on the housing, a pair of measuring-cups in the housing between the hopper and mixing-receptacles for receiving ingredients from the hopper and arranged to be rotated approximately 180 degrees for discharging said ingredients to the intake-apertures of the mixing-receptacles, said mixing-receptacles being movable in acircles arc of approximately 90 degrees for disposing its discharge-aperture in register with the discharge-aperture of the housing to permit the ingredients to fall upon said baking-grids, and means for heating the baking-grids.

2. In a waflle machine, a frame, bakinggrids mounted on the frame, a housing above said baking-grids carried by the frame and having a discharge-aperture, a cylindrical mixing-receptacle journalled in the housing having an intake-aperture and a dischargeaperture, a hopper on the housing for dispensing ingredients, a measuring-cup in the housing between the mixing-receptacle and hopper for receiving ingredients from said hopper and arranged to be rotated approxi mately 180 degrees for discharging said ingredients to the intake-aperture of the mixing-receptacle, said mixing-receptacle being movable in a circles arc of 90 degrees for disposing its discharge-aperture in register with the discharge-aperture of the housing to permit the ingredients to fall upon the baking-grids, and means for heating the baking-grids.

3. In a waflle machine, a frame, a pair of opposed baking-grids mounted on the frame and adapted to be swung upwardly to a horizontal position, a housing having dischargeapertures and disposed above the bakinggrids, a pair of apertured miXing-receptacles adapted to contain batter and movable in the housing for disposing its apertures in register with the apertures of the housing to permit a discharge of the batter to the baking-grids, a second pair of opposed baking-grids mounted upon the frame and adapted to be swung downwardly upon the batter and upon the first named grids, means for heating the grids for producing waflies from said batter, and means to cause the grids of the first named pair to swing downwardly to permit a release of the waflles therefrom.

4. In a wafile machine, a hopper adapted to contain dry ingredients for wafiles and provided with an apertured-housing, bakinggridsbelow the housing, waflle dispensing devices below the baking-grids, apertiured mixing-receptacles in the housing, measuring-cups movable in the housing for conducting dry'ingredients from the hopper to the mixing'recept,acles, actuated stirring de 

